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824 lines
24 KiB
Perl
824 lines
24 KiB
Perl
# File: DualIndexSQLiteObject.pm
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#
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# Purpose: Provides a dual-indexed SQLite object with an abstracted API that includes
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# setting and deleting values, caching, displaying nearest matches, etc. Designed to
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# be as compatible as possible with DualIndexHashObject; e.g. get_keys, get_data, etc.
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# SPDX-FileCopyrightText: 2021 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::DualIndexSQLiteObject;
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use warnings; use strict;
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use feature 'unicode_strings';
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use DBI;
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use Text::Levenshtein qw(fastdistance);
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sub new {
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my ($proto, %conf) = @_;
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my $class = ref($proto) || $proto;
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my $self = bless {}, $class;
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$self->initialize(%conf);
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return $self;
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}
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sub initialize {
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my ($self, %conf) = @_;
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$self->{name} = $conf{name} // 'Dual Index SQLite object';
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$self->{filename} = $conf{filename} // Carp::croak("Missing filename in " . __FILE__);
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$self->{dbh} = undef;
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$self->{cache} = {};
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$self->{cache_timeouts} = {};
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$self->{debug} = $conf{debug} // '';
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$self->begin;
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}
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sub begin {
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my ($self) = @_;
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print("Opening $self->{name} database ($self->{filename})\n");
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$self->{dbh} = DBI->connect(
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"dbi:SQLite:dbname=$self->{filename}", "", "",
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{RaiseError => 1, PrintError => 0, AutoInactiveDestroy => 1, sqlite_unicode => 1}
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) or die $DBI::errstr;
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if ($@) { print("Error initializing $self->{name} database: $@\n"); }
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}
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sub end {
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my ($self) = @_;
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print("Closing $self->{name} database ($self->{filename})\n");
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if (defined $self->{dbh}) {
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$self->{dbh}->commit;
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$self->{dbh}->disconnect;
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$self->{dbh} = undef;
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}
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}
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sub load {
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my ($self) = @_;
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$self->create_database;
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$self->create_cache;
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}
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sub create_database {
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my ($self) = @_;
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eval {
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$self->{dbh}->do(<<SQL);
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CREATE TABLE IF NOT EXISTS Stuff (
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index1 TEXT COLLATE NOCASE,
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index2 TEXT COLLATE NOCASE
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)
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SQL
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$self->{dbh}->do('CREATE INDEX IF NOT EXISTS idx1 ON Stuff (index1, index2)');
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};
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print($@) if $@;
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}
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sub create_cache {
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my ($self) = @_;
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$self->{cache} = {};
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my ($index1_count, $index2_count) = (0, 0);
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foreach my $index1 ($self->get_keys(undef, undef, 1)) {
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$index1_count++;
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my $lc_index1 = lc $index1;
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foreach my $index2 ($self->get_keys($lc_index1, undef, 1)) {
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my $lc_index2 = lc $index2;
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$index2_count++;
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$self->{cache}->{$lc_index1}->{lc $index2} = {};
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$self->{cache}->{$lc_index1}->{_name} = $index1 if $index1 ne $lc_index1;
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$self->{cache}->{$lc_index1}->{$lc_index2}->{_name} = $index2 if $index2 ne $lc_index2;
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}
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}
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print("Cached $index2_count $self->{name} objects in $index1_count groups.\n");
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}
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sub cache_remove {
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my ($self, $index1, $index2) = @_;
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if (not defined $index2) {
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delete $self->{cache}->{$index1};
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delete $self->{cache_timeouts}->{$index1};
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} else {
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delete $self->{cache}->{$index1}->{$index2};
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delete $self->{cache}->{$index1} if not grep { $_ ne '_name' } keys %{$self->{cache}->{$index1}};
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delete $self->{cache_timeouts}->{$index1}->{$index2};
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delete $self->{cache_timeouts}->{$index1} if not keys %{$self->{cache_timeouts}->{$index1}};
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}
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}
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sub trim_cache {
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my ($self) = @_;
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my $now = time;
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foreach my $index1 (keys %{$self->{cache_timeouts}}) {
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foreach my $index2 (keys %{$self->{cache_timeouts}->{$index1}}) {
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if ($now >= $self->{cache_timeouts}->{$index1}->{$index2}) {
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my $name = $self->{cache}->{$index1}->{$index2}->{_name};
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$self->{cache}->{$index1}->{$index2} = {};
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$self->{cache}->{$index1}->{$index2}->{_name} = $name if defined $name;
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delete $self->{cache_timeouts}->{$index1}->{$index2};
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delete $self->{cache_timeouts}->{$index1} if not keys %{$self->{cache_timeouts}->{$index1}};
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}
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}
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}
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}
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sub create_metadata {
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my ($self, $columns) = @_;
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return if not $self->{dbh};
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$self->{columns} = $columns;
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eval {
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my %existing = ();
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foreach my $col (@{$self->{dbh}->selectall_arrayref("PRAGMA TABLE_INFO(Stuff)")}) { $existing{$col->[1]} = $col->[2]; }
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$self->{dbh}->begin_work;
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foreach my $col (sort keys %$columns) {
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unless (exists $existing{$col}) { $self->{dbh}->do("ALTER TABLE Stuff ADD COLUMN \"$col\" $columns->{$col}"); }
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}
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$self->{dbh}->commit;
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};
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if ($@) {
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print($@);
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$self->{dbh}->rollback;
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}
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}
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sub begin_work {
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my ($self) = @_;
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$self->{dbh}->begin_work;
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}
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sub commit {
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my ($self) = @_;
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$self->{dbh}->commit;
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}
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sub levenshtein_matches {
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my ($self, $index1, $index2, $distance, $strictnamespace) = @_;
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my $comma = '';
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my $result = '';
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$distance = 0.60 if not defined $distance;
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$index1 = '.*' if not defined $index1;
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if (not $index2) {
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foreach my $index (sort $self->get_keys) {
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my $distance_result = fastdistance($index1, $index);
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my $length = (length $index1 > length $index) ? length $index1 : length $index;
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if ($distance_result / $length < $distance) {
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my $name = $self->get_data($index, '_name');
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if ($name =~ / /) { $result .= $comma . "\"$name\""; }
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else { $result .= $comma . $name; }
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$comma = ", ";
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}
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}
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} else {
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if (not $self->exists($index1)) { return 'none'; }
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my $last_header = '';
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my $header = '';
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foreach my $i1 (sort $self->get_keys) {
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$header = '[' . $self->get_data($i1, '_name') . '] ';
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$header = '[global] ' if $header eq '[.*] ';
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if ($strictnamespace) {
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next unless $i1 eq '.*' or lc $i1 eq lc $index1;
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$header = "" unless $header eq '[global] ';
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}
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foreach my $i2 (sort $self->get_keys($i1)) {
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my $distance_result = fastdistance($index2, $i2);
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my $length = (length $index2 > length $i2) ? length $index2 : length $i2;
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if ($distance_result / $length < $distance) {
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my $name = $self->get_data($i1, $i2, '_name');
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$header = "" if $last_header eq $header;
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$last_header = $header;
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$comma = '; ' if $comma ne '' and $header ne '';
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if ($name =~ / /) { $result .= $comma . $header . "\"$name\""; }
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else { $result .= $comma . $header . $name; }
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$comma = ", ";
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}
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}
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}
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}
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$result =~ s/(.*), /$1 or /;
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$result = 'none' if $comma eq '';
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return $result;
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}
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sub exists {
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my ($self, $index1, $index2, $data_index) = @_;
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return 0 if not defined $index1;
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$index1 = lc $index1;
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return 0 if not grep { $_ eq $index1 } $self->get_keys;
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return 1 if not defined $index2;
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$index2 = lc $index2;
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return 0 if not grep { $_ eq $index2 } $self->get_keys($index1);
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return 1 if not defined $data_index;
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return defined $self->get_data($index1, $index2, $data_index);
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}
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sub get_keys {
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my ($self, $index1, $index2, $nocache) = @_;
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my @keys;
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if (not defined $index1) {
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if (not $nocache) { return keys %{$self->{cache}}; }
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@keys = eval {
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my $context = $self->{dbh}->selectall_arrayref('SELECT DISTINCT index1 FROM Stuff');
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if (@$context) {
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return map { $_->[0] } @$context;
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} else {
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return ();
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}
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};
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if ($@) {
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print($@);
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return undef;
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}
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return @keys;
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}
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$index1 = lc $index1;
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if (not defined $index2) {
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if (not $nocache) { return grep { $_ ne '_name' } keys %{$self->{cache}->{$index1}}; }
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@keys = eval {
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my $sth = $self->{dbh}->prepare('SELECT index2 FROM Stuff WHERE index1 = ?');
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$sth->execute($index1);
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my $context = $sth->fetchall_arrayref;
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if (@$context) {
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return map { $_->[0] } @$context;
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} else {
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return ();
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}
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};
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if ($@) {
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print($@);
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return ();
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}
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return @keys;
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}
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$index2 = lc $index2;
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if (not $nocache) {
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@keys = grep { $_ ne '_name' } keys %{$self->{cache}->{$index1}->{$index2}};
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return @keys if @keys;
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}
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@keys = eval {
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my $sth = $self->{dbh}->prepare('SELECT * FROM Stuff WHERE index1 = ? AND index2 = ?');
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$sth->execute($index1, $index2);
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my $context = $sth->fetchall_arrayref({});
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my @k = ();
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return @k if not @{$context};
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my ($lc_index1, $lc_index2) = (lc $index1, lc $index2);
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foreach my $key (keys %{$context->[0]}) {
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next if $key eq 'index1' or $key eq 'index2';
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push @k, $key if defined $context->[0]->{$key};
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$self->{cache}->{$lc_index1}->{$lc_index2}->{$key} = $context->[0]->{$key};
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}
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my $timeout = 60 * 30;
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$self->{cache_timeouts}->{$lc_index1}->{$lc_index2} = time + $timeout;
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return @k;
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};
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if ($@) {
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print($@);
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return ();
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}
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return @keys;
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}
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sub get_each {
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my ($self, @opts) = @_;
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my $sth = eval {
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my $sql = 'SELECT ';
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my @keys = ();
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my @values = ();
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my @where = ();
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my @sort = ();
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my $everything = 0;
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foreach my $expr (@opts) {
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my ($key, $op, $value) = split /\s*([!=<>]+)\s*/, $expr, 3;
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if ($key eq '_everything') {
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$everything = 1;
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push @keys, '*';
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next;
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}
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if ($key eq '_sort') {
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if ($value =~ s/^\-//) {
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push @sort, "$value DESC";
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} else {
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$value =~ s/^\+//; # optional
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push @sort, "$value ASC";
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}
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next;
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}
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if (defined $op) {
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my $prefix = 'AND';
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if ($op eq '=' or $op eq '==') {
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$op = '=';
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} elsif ($op eq '!=' or $op eq '<>') {
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$op = '!=';
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}
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if ($key =~ s/^(OR|AND)\s+//) {
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$prefix = $1;
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}
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$prefix = '' if not @where;
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push @where, [ $prefix, $key, $op ];
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push @values, $value;
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}
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push @keys, $key unless $everything or grep { $_ eq $key } @keys;
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}
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$sql .= join ', ', @keys;
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$sql .= ' FROM Stuff WHERE';
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my $in_or = 0;
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for (my $i = 0; $i < @where; $i++) {
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my ($prefix, $key, $op) = @{$where[$i]};
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my ($next_prefix, $next_key) = ('', '');
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if ($i < @where - 1) {
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($next_prefix, $next_key) = @{$where[$i + 1]};
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}
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if ($next_prefix eq 'OR' and $next_key eq $key) {
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$sql .= "$prefix ";
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$sql .= '(' if not $in_or;
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$sql .= "\"$key\" $op ? ";
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$in_or = 1;
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} else {
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$sql .= "$prefix \"$key\" $op ? ";
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if ($in_or) {
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$sql .= ') ';
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$in_or = 0;
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}
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}
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}
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$sql .= ')' if $in_or;
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$sql .= ' ORDER BY ' . join(', ', @sort) if @sort;
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my $sth = $self->{dbh}->prepare($sql);
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my $param = 0;
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foreach my $value (@values) {
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$sth->bind_param(++$param, $value);
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}
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$sth->execute;
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return $sth;
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};
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if ($@) {
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print("Error getting data: $@\n");
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return undef;
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}
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return $sth;
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}
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sub get_next {
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my ($self, $sth) = @_;
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my $data = eval {
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return $sth->fetchrow_hashref;
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};
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if ($@) {
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print("Error getting next: $@\n");
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return undef;
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}
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return $data;
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}
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sub get_all {
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my ($self, @opts) = @_;
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my $sth = $self->get_each(@opts);
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my $data = eval {
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return $sth->fetchall_arrayref({});
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};
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if ($@) {
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print("Error getting data: $@\n");
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return undef;
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}
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return @$data;
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}
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sub get_key_name {
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my ($self, $index1, $index2) = @_;
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my $lc_index1 = lc $index1;
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return $lc_index1 if not exists $self->{cache}->{$lc_index1};
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if (not defined $index2) {
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if (exists $self->{cache}->{$lc_index1}->{_name}) {
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return $self->{cache}->{$lc_index1}->{_name};
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} else {
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return $lc_index1;
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}
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}
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my $lc_index2 = lc $index2;
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return $lc_index2 if not exists $self->{cache}->{$lc_index1}->{$lc_index2};
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if (exists $self->{cache}->{$lc_index1}->{$lc_index2}->{_name}) {
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return $self->{cache}->{$lc_index1}->{$lc_index2}->{_name};
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} else {
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return $lc_index2;
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}
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}
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sub get_data {
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my ($self, $index1, $index2, $data_index) = @_;
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my $lc_index1 = lc $index1;
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my $lc_index2 = lc $index2;
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return undef if not exists $self->{cache}->{$lc_index1};
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return undef if not exists $self->{cache}->{$lc_index1}->{$lc_index2} and $lc_index2 ne '_name';
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if (not defined $data_index) {
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# special case for compatibility with DualIndexHashObject
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if ($lc_index2 eq '_name') {
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if (exists $self->{cache}->{$lc_index1}->{_name}) {
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return $self->{cache}->{$lc_index1}->{_name};
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} else {
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return $lc_index1;
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}
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}
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my $data = eval {
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my $sth = $self->{dbh}->prepare('SELECT * FROM Stuff WHERE index1 = ? AND index2 = ?');
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$sth->execute($index1, $index2);
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my $context = $sth->fetchall_arrayref({});
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my $d = {};
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foreach my $key (keys %{$context->[0]}) {
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next if $key eq 'index1' or $key eq 'index2';
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if (defined $context->[0]->{$key}) {
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$self->{cache}->{$lc_index1}->{$lc_index2}->{$key} = $context->[0]->{$key};
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$d->{$key} = $context->[0]->{$key};
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}
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}
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my $timeout = 60 * 30;
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$self->{cache_timeouts}->{$lc_index1}->{$lc_index2} = time + $timeout;
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return $d;
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};
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if ($@) {
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print("Error getting data for ($index1, $index2): $@\n");
|
|
return undef;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
# special case for compatibility with DualIndexHashObject
|
|
if ($data_index eq '_name') {
|
|
if (exists $self->{cache}->{$lc_index1}->{$lc_index2}->{_name}) {
|
|
return $self->{cache}->{$lc_index1}->{$lc_index2}->{_name};
|
|
} else {
|
|
return $lc_index2;
|
|
}
|
|
}
|
|
|
|
if (exists $self->{cache}->{$lc_index1}->{$lc_index2}->{$data_index}) {
|
|
return $self->{cache}->{$lc_index1}->{$lc_index2}->{$data_index};
|
|
}
|
|
|
|
my $value = eval {
|
|
my $sth = $self->{dbh}->prepare('SELECT * FROM Stuff WHERE index1 = ? AND index2 = ?');
|
|
$sth->execute($index1, $index2);
|
|
my $context = $sth->fetchall_arrayref({});
|
|
|
|
foreach my $key (keys %{$context->[0]}) {
|
|
next if $key eq 'index1' or $key eq 'index2';
|
|
$self->{cache}->{$lc_index1}->{$lc_index2}->{$key} = $context->[0]->{$key};
|
|
}
|
|
|
|
my $timeout = 60 * 30;
|
|
$self->{cache_timeouts}->{$lc_index1}->{$lc_index2} = time + $timeout;
|
|
|
|
return $context->[0]->{$data_index};
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error getting data for ($index1, $index2, $data_index): $@\n");
|
|
return undef;
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
sub add {
|
|
my ($self, $index1, $index2, $data, $quiet) = @_;
|
|
|
|
my $name1 = $self->get_data($index1, '_name') // $index1;
|
|
|
|
eval {
|
|
my $sth;
|
|
|
|
if (not $self->exists($index1, $index2)) {
|
|
$sth = $self->{dbh}->prepare('INSERT INTO Stuff (index1, index2) VALUES (?, ?)');
|
|
$sth->execute($name1, $index2);
|
|
}
|
|
|
|
my $sql = 'UPDATE Stuff SET ';
|
|
|
|
my $comma = '';
|
|
foreach my $key (sort keys %$data) {
|
|
if (not exists $self->{columns}->{$key}) {
|
|
next;
|
|
}
|
|
$sql .= "$comma\"$key\" = ?";
|
|
$comma = ', ';
|
|
}
|
|
|
|
$sql .= ' WHERE index1 == ? AND index2 == ?';
|
|
|
|
$sth = $self->{dbh}->prepare($sql);
|
|
|
|
my $param = 1;
|
|
foreach my $key (sort keys %$data) {
|
|
next if not exists $self->{columns}->{$key};
|
|
$sth->bind_param($param++, $data->{$key});
|
|
}
|
|
|
|
$sth->bind_param($param++, $index1);
|
|
$sth->bind_param($param++, $index2);
|
|
$sth->execute();
|
|
|
|
# no errors updating SQL -- now we update cache
|
|
my ($lc_index1, $lc_index2) = (lc $index1, lc $index2);
|
|
$self->{cache}->{$lc_index1}->{_name} = $index1 if $index1 ne $lc_index1 and not exists $self->{cache}->{$lc_index1}->{_name};
|
|
if (grep { $_ ne '_name' } keys %{$self->{cache}->{$lc_index1}->{$lc_index2}}) {
|
|
foreach my $key (sort keys %$data) {
|
|
next if not exists $self->{columns}->{$key};
|
|
$self->{cache}->{$lc_index1}->{$lc_index2}->{$key} = $data->{$key};
|
|
}
|
|
} else {
|
|
$self->{cache}->{$lc_index1}->{lc $index2} = {}
|
|
}
|
|
$self->{cache}->{$lc_index1}->{$lc_index2}->{_name} = $index2 if not exists $self->{cache}->{$lc_index1}->{$lc_index2}->{_name} and $index2 ne $lc_index2;
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error adding $self->{name} $index2 to $index1: $@\n");
|
|
$self->{dbh}->rollback;
|
|
return "Error adding $index2 to $name1: $@\n";
|
|
}
|
|
|
|
$index1 = 'global' if $index1 eq '.*';
|
|
$index2 = "\"$index2\"" if $index2 =~ / /;
|
|
print("$self->{name}: [$index1]: $index2 added.\n") unless $quiet;
|
|
return "$index2 added to $name1.";
|
|
}
|
|
|
|
sub remove {
|
|
my ($self, $index1, $index2, $data_index, $dont_save) = @_;
|
|
|
|
if (not $self->exists($index1)) {
|
|
my $result = "$self->{name}: $index1 not found; similiar matches: ";
|
|
$result .= $self->levenshtein_matches($index1);
|
|
return $result;
|
|
}
|
|
|
|
my $name1 = $self->get_data($index1, '_name');
|
|
$name1 = 'global' if $name1 eq '.*';
|
|
my $lc_index1 = lc $index1;
|
|
|
|
if (not defined $index2) {
|
|
eval {
|
|
my $sth = $self->{dbh}->prepare("DELETE FROM Stuff WHERE index1 = ?");
|
|
$sth->execute($index1);
|
|
|
|
$self->cache_remove($index1);
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error removing $index1 from $self->{name}: $@\n");
|
|
return "Error removing $name1: $@";
|
|
}
|
|
|
|
return "$name1 removed.";
|
|
}
|
|
|
|
if (not $self->exists($index1, $index2)) {
|
|
my $result = "$self->{name}: [$name1] $index2 not found; similiar matches: ";
|
|
$result .= $self->levenshtein_matches($index1, $index2);
|
|
return $result;
|
|
}
|
|
|
|
my $name2 = $self->get_data($index1, $index2, '_name');
|
|
$name2 = "\"$name2\"" if $name2 =~ / /;
|
|
my $lc_index2 = lc $index2;
|
|
|
|
if (not defined $data_index) {
|
|
eval {
|
|
my $sth = $self->{dbh}->prepare("DELETE FROM Stuff WHERE index1 = ? AND index2 = ?");
|
|
$sth->execute($index1, $index2);
|
|
|
|
$self->cache_remove($index1, $index2);
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error removing $self->{name}: [$name1] $name2: $@\n");
|
|
return "Error removing $name2 from $name1: $@";
|
|
}
|
|
|
|
return "$name2 removed from $name1.";
|
|
}
|
|
|
|
if (not exists $self->{columns}->{$data_index}) {
|
|
return "$self->{name} have no such metadata $data_index.";
|
|
}
|
|
|
|
if (defined $self->get_data($lc_index1, $lc_index2, $data_index)) {
|
|
eval {
|
|
my $sth = $self->{dbh}->prepare("UPDATE Stuff SET '$data_index' = ? WHERE index1 = ? AND index2 = ?");
|
|
$sth->execute(undef, $index1, $index2);
|
|
|
|
$self->{cache}->{$index1}->{$index2}->{$data_index} = undef;
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error unsetting $self->{name}: $name1.$name2: $@\n");
|
|
return "Error unsetting $data_index from $name2: $@";
|
|
}
|
|
|
|
return "$name2.$data_index unset.";
|
|
}
|
|
|
|
return "$name2.$data_index is not set.";
|
|
}
|
|
|
|
sub set {
|
|
my ($self, $index1, $index2, $key, $value) = @_;
|
|
|
|
if (not $self->exists($index1)) {
|
|
my $result = "$self->{name}: $index1 not found; similiar matches: ";
|
|
$result .= $self->levenshtein_matches($index1);
|
|
return $result;
|
|
}
|
|
|
|
if (not $self->exists($index1, $index2)) {
|
|
my $secondary_text = $index2 =~ / / ? "\"$index2\"" : $index2;
|
|
my $result = "$self->{name}: [" . $self->get_data($index1, '_name') . "] $secondary_text not found; similiar matches: ";
|
|
$result .= $self->levenshtein_matches($index1, $index2);
|
|
return $result;
|
|
}
|
|
|
|
my $name1 = $self->get_data($index1, '_name');
|
|
my $name2 = $self->get_data($index1, $index2, '_name');
|
|
|
|
$name1 = 'global' if $name1 eq '.*';
|
|
$name2 = "\"$name2\"" if $name2 =~ / /;
|
|
|
|
if (not defined $key) {
|
|
my $result = "[$name1] $name2 keys:\n";
|
|
my @metadata = ();
|
|
foreach my $key (sort $self->get_keys($index1, $index2)) {
|
|
my $value = $self->get_data($index1, $index2, $key);
|
|
push @metadata, "$key => $value" if defined $value;
|
|
}
|
|
if (not @metadata) { $result .= "none"; }
|
|
else { $result .= join ";\n", @metadata; }
|
|
return $result;
|
|
}
|
|
|
|
if (not exists $self->{columns}->{$key}) {
|
|
return "$self->{name} have no such metadata $key.";
|
|
}
|
|
|
|
if (not defined $value) { $value = $self->get_data($index1, $index2, $key); }
|
|
else {
|
|
eval {
|
|
my $sth = $self->{dbh}->prepare("UPDATE Stuff SET '$key' = ? WHERE index1 = ? AND index2 = ?");
|
|
$sth->execute($value, $index1, $index2);
|
|
|
|
my ($lc_index1, $lc_index2) = (lc $index1, lc $index2);
|
|
if (exists $self->{cache}->{$lc_index1}
|
|
and exists $self->{cache}->{$lc_index1}->{$lc_index2}
|
|
and exists $self->{cache}->{$lc_index1}->{$lc_index2}->{$key}) {
|
|
$self->{cache}->{$lc_index1}->{$lc_index2}->{$key} = $value;
|
|
}
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error setting $self->{name} $index1 $index2.$key: $@\n");
|
|
return "Error setting $name2.$key: $@";
|
|
}
|
|
}
|
|
|
|
return "[$name1] $name2.$key " . (defined $value ? "set to $value" : "is not set.");
|
|
}
|
|
|
|
sub unset {
|
|
my ($self, $index1, $index2, $key) = @_;
|
|
|
|
if (not $self->exists($index1)) {
|
|
my $result = "$self->{name}: $index1 not found; similiar matches: ";
|
|
$result .= $self->levenshtein_matches($index1);
|
|
return $result;
|
|
}
|
|
|
|
my $name1 = $self->get_data($index1, '_name');
|
|
$name1 = 'global' if $name1 eq '.*';
|
|
|
|
if (not $self->exists($index1, $index2)) {
|
|
my $result = "$self->{name}: [$name1] $index2 not found; similiar matches: ";
|
|
$result .= $self->levenshtein_matches($index1, $index2);
|
|
return $result;
|
|
}
|
|
|
|
my $name2 = $self->get_data($index1, $index2, '_name');
|
|
$name2 = "\"$name2\"" if $name2 =~ / /;
|
|
|
|
if (not exists $self->{columns}->{$key}) {
|
|
return "$self->{name} have no such metadata $key.";
|
|
}
|
|
|
|
eval {
|
|
my $sth = $self->{dbh}->prepare("UPDATE Stuff SET '$key' = ? WHERE index1 = ? AND index2 = ?");
|
|
$sth->execute(undef, $index1, $index2);
|
|
|
|
my ($lc_index1, $lc_index2) = (lc $index1, lc $index2);
|
|
if (exists $self->{cache}->{$lc_index1}
|
|
and exists $self->{cache}->{$lc_index1}->{$lc_index2}
|
|
and exists $self->{cache}->{$lc_index1}->{$lc_index2}->{$key}) {
|
|
$self->{cache}->{$lc_index1}->{$lc_index2}->{$key} = undef;
|
|
}
|
|
};
|
|
|
|
if ($@) {
|
|
print("Error unsetting key: $@\n");
|
|
return "Error unsetting key: $@";
|
|
}
|
|
|
|
return "[$name1] $name2.$key unset.";
|
|
}
|
|
|
|
# nothing to do here for SQLite
|
|
# kept for compatibility with DualIndexHashObject
|
|
sub save { }
|
|
sub clear { }
|
|
|
|
1;
|